Team Powers Speed Control Bluetooth Device (TPR-SP-BT)   [TPR-SP-BT]

Specs:

-Voltage: 7.4~8.4V

-Bluetooth Range: ~10 meter(but will decrease whenever sound signal upsurge in area)

-Size: ~25mm (L) x 17mm (W)x9mm (H)

Body weight: ~4.2g